I know you're getting a whole bunch of different advice and you probably don't care or need more, but it sounds to me like you want a V8 just to have a V8. I can totally understand that, but really there's nothing wrong with your car. Hell, if gas wasn't the way it is I'd love to have an old V6 vert for a DD.
If it were me, I wouldn't spend any money modifying that car. I would just spend money restoring it and keeping it in good running order. Learn how to drive and honestly, the time will fly by and you'll be able to afford a 5.0. I think that car will be worth more if you keep it stock and clean, V6 or not, someone out there wants one. Good luck.